672605

Appears in sequences

• A051851(n)/row_index_of(n).at n=65A051852
• a(n) = (n^(n-1)-1)/(n-1)^2.at n=7A060073
• a(n) = (3^(2^n) - 1)/2^(n + 2).at n=3A068531
• Number of Lyndon words on {1,2,3} with an odd number of 1's and an odd number of 2's.at n=15A136704
• Least number k such that 2*k*n + 1 is a prime dividing 3^n + 1.at n=14A189240
• Bisection of A136704.at n=7A253076
• a(n) = p(0,n), where p(x,n) is the strong divisibility sequence of polynomials based on sqrt(3) as in A327321.at n=15A329008
• a(n) = ((2*n+1)^16 - 1)/64.at n=1A359499